Warp-tensioning device for looms



Oct. 16, 1923'. 1,470,716

W. EBELL WARP TENSIONING DEVICE FOR LOOMS Filed Aug- 30. 1922 [RY/6722507". )Vrner Z56ZZ Patented Oct. 16, 1923.

UNITED STATES PATENT OFFICE.

WERNER EBELL, O1? NEURUPPIN, GERMANY.

WARP-TENSIONING- DEVICE FOR LOOIVIS.

Application filed August 30, 1922. Serial No. 585,231.

5 new and useful Improvements in ll arpa Tensioning Devices for Looms (for which I have filed an application for, patent in Germany on the 12th of hlay, 1921), of which the following is a specification.

This invention relates to a warp tensioning device for looms designed for the weaving of coarse fabric, for instance transmission belts, conveyor bands or the like. The coarse threaded warps used for this -pur 15 pose are conducted, without prejudicing their strength, between roughened cylin ders which are controlled by the pressure of a lever variably loaded by a weight.

If the tension of the coarse threaded warps produced by the roughened cylinders should not be suflicient, the Warp threads before getting to the point where they are to be used could, in order to increase their tension, be conducted further in a manner known per se around one or several cylin-.

ders adapted to be locked.

,An embodiment of the invention is shown.

by way of example in the only figure of the accompanying drawing.

In the frame a of the loom two roughened, rotatably supported cylinders Z) and o are arranged one above the other, of which one, the upper cylinder b, is non-adjustable, the other, cylinder 0, being adjustably mounted in slots d. Cylinder o is controlled by the pressure of a lever 7", fulcrumed at e, which has at its free end a pin 5/ upon which weight plates h are placed. The lever f holds the adjustable cylinder 0 toward the cylinder 6 with a force proportioned to the weight supported upon its outerend. The adjustable cylinder 0 is so mounted that when free from the action of the weighted lever f it will automatically fall away from the cylinder 6, thus leaving suflicient space between these cylinders to pass the warp threads between them as is required when the threads, or some of them, become broken. v I

The warp threads 2' pass between the roughened cylinders b and 0 to be conducted over the rollers 70 and Z to the corresponding shafts of the loom.

By varying the load produced by the weight plates 12- the pressure between the cylinders 0 and b can be increased or reduced whereby the tensionof the warp threads can be regulated.

If a warp thread should break the outer end of the weighted lever maybe lifted thus freeing the adjustable cylinder 0 from the action of the lever, which thereupon falls away from the cylinder 5 leaving space between the cylinders to pass thebroken threads without interfering with the ad justments of any of the permanently mounted or supported parts of the machine. The

wearisorne work which in such cases becomes necessary with the usual tensioning devices is avoided by the improved tensioning device whereby the etliciency of the loom is considerably increased.

I claim I An improved warp tensioning device for looms designed for the weaving of coarse fabrics, including, in combination, a pair of rotatably supported cylinders arranged i one above the other, between which are passed the warp threads, the upper cylinderbeing non-adjustable and the lower one being mounted so as to freely move away from the non-adjustable cylinder when unsupported, a 1 K61 acting upon the lower, adjustable, cylinder to hold it toward the upper cylinder with yielding pressure, and weights carried at the outer end of the lever so that variable pressure may be exerted upon the adjustable cylinder, the lever being arranged so that when its outer end. is

lifted the adjustable cylinder is freed and allowed to move away from the nonadjustable cylinder.

In testimony whereof]: afliX my signature.

WERNER EBnLL. 

